What Is a Typical/Expected Amount Of Frame Rate Jitter In IP Cameras?

Recently while helping a non-tech proprietor friend configure their newly acquired NVR, I had one of those unexpected moments that seem to come when you are explaining something you know comparatively well to someone who doesn't. And then they ask the question: "How come if the frame rate is set to 10 FPS are there many seconds where there are only 7 and some where they are over 11?" And I...

* ****, ******* ****** **** *** ********** ********* *** ******** just * ******, *** *** ********* ********* **** * *******. And **** **** *** "**** ********, *** *** *** *****" and "*** *** *** ****'* ** ****". **** *** ***** is ** ********** ** ***** *** ****** ************; *** ******* self-medicated **** *** ******** ******* ** ********** ****** ** ********* the *** ****** ******. ** ** ****** **** *** ***** rate * *** *** ***** ***** *** *********** "*********" *** the ********** ******* ****** ******. ** **** *** **** **** to **** ******, ** ***** **** ******** ** **, *** seeing ** **** *** **** ** ******* ***** *** **** you ***** *****.

** *** ** *** **** ****'* ****** ****** *** ****'* indicative ** ********* ******** ****? **%, **%, ** *** *** see ** ** ***? **** *** ******** *** * ******-*** timestamp ** *** ***** ** ********* ****** ** ********? *** there *** ** *******/***'* ***** ** ** ***** ******? ** good ** * ********'* *********? ******.

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"*** **** ** *** ***** **** ** *** ** ** FPS *** ***** **** ******* ***** ***** *** **** **** **** ***** **** *** **** **?"

*** **** ** **** **** ** **** **** ** * or ** ** **? ** ***** ** ** ****** ******* / **** ***? ** ** ** ********?

*** ***** **** ** ** ****** '*** *****'? **** ** *** **** ** ***** ***** a ***** ***** **** ***** **** ********** **** ** ***** on.

**** ****** *** ****? **** ***?

*** **** ** **** **** ** **** **** ** * or ** ** **? ** ***** ** ** ****** ******* / **** ***? ** ** ** ********?

** ******'* ****, * ***, ** ******** *** ***** ******* one ***** ** * **** *** ******* ** *** *********, to *********** *********.

** ****** **** * ******** *******, **** *** ****** $***, came **** * ** *******. *** *** **** *** *** for. * *** **** ***** *** ***** ********** **** ** was ************. **'* *** ***; ***** * **** ** *** normal, ** ******* **. ** *** *** **** ******** ** his "*******-******-****" ** **** ******. ***** *** ** ***** *** probably ******* ****** ******** **********. *** **** *** ***** **********? Have *** ***** **** ********* ********* ****** ** ******? *** did *** **** ** *** *********? **** ***** **** **** flipping **** **-** ******** ***, **** *** *** ****** *****?

*'** *** * **** ** *** ******, *** ****'* *** the *****. *'* *** ****** *** ******* ** **** ** a **** *** *** ***** ****** ** ***, ** *** this ** *** ****. ** ******* ********** **** ********** *** actual ********, ** ***** *** ********** ** ******. ** *** too ***** ** *******, *** *** *** *'** ****** ** drop **.

"** ****** **** * ******** *******, **** *** ****** $***, came **** * ** *******"

$*** *** * ** ******* *******? ****** **** **** ********* **** ** **. ****'* ****** expensive.

****** **** *** ********** ** ** ** ****** *** ****** 10fps ************ ** ******* (********* ***** ********** **** * '*******' network). ***** ** *** * ******, ***** ***** ******* ***?